I have just completed week 4 run 1 and I really struggled for some reason, my legs felt ok, my breathing was ok, but at the start of the final 5 min run I felt really dizzy with some tingling on the left side of my face. I didn't want to be defeated so carried on jogging really slowly at points and managed to finish. Once Laura told be to slow down I felt as if I could pass out and really light headed, when I got home I had a banana and some water but it has taken about an hour for the tingling to go away and for me to feel normal. I am really worried for the first time that this is going to be too much for me. Anyone else had feelings like this, or can tell me what I may be doing wrong?